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1. Dictionary

   a·lert

   /əˈlərt/

   adjective

   • 1. quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant: "an alert police officer discovered a truck full of explosives" Similar vigilanthypervigilantwide awakeawarewatchfulattentiveobservantcircumspectwarycharyheedfulcannyon the lookouton one's guardon one's toesall earskeeping one's eyes open/peeledkeeping a weather eye openon the qui viveOpposite inattentive
   • ▪ able to think clearly; intellectually active: "she remained active and alert until well into her eighties" Similar quick-wittedsharpbrightquickkeenperceptivewide awakeresponsiveagileacuteastuteinformal:on the ballon one's toesquick off the markquick on the uptakeall therewith itbright-eyed and bushy-tailedOpposite slow

   noun

   • 1. the state of being watchful for possible danger: "security forces were placed on alert" Similar vigilancewatchfulnesscarefulnessattentivenessguardednesscarecautioncautiousnesswarinesscharinessalertnesshypervigilancecircumspectionprudenceheedfulnessheedmindfulnessOpposite carelessness
   • ▪ an announcement or signal warning of danger: "a bomb alert" Similar warningcautionnotificationnoticeexhortationinjunctionsirenalarmsignaldanger signaldistress signal
   • ▪ a period of vigilance in response to a warning of danger: "traffic was halted during the alert"
   • ▪ a signal on an electronic device that prompts the user to do something or attracts their attention: "a vibrating alert is a discreet alternative to ringtones"

   verb

   • 1. warn (someone) of a danger, threat, or problem, typically with the intention of having it avoided or dealt with: "he alerted people to the dangers of smoking"

   Word Origin late 16th century (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’.

   Derivatives

   • 1. alertly adverb

   Scrabble Points: 5

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   More definitions, origin and scrabble points

2. www.merriam-webster.com › dictionary › alertAlert Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › alert

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   The meaning of ALERT is watchful and prompt to meet danger or emergency. How to use alert in a sentence. Synonym Discussion of Alert.

3. dictionary.cambridge.org › dictionary › englishALERT | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   ALERT definition: 1. quick to see, understand, and act in a particular situation: 2. a warning to people to be…. Learn more.

4. www.collinsdictionary.com › dictionary › englishALERT definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   alert describes a ready and prompt attentiveness together with a quick intelligence: The tourist was alert and eager to see the sights. vigilant suggests some immediate necessity for keen, active observation, and for continuing alertness: Knowing the danger, the scout was unceasingly vigilant. watchful suggests carefulness and preparedness ...

5. www.vocabulary.com › dictionary › alertAlert - Definition, Meaning & Synonyms - Vocabulary.com

   www.vocabulary.com › dictionary › alert

   When you issue an alert you give warning, alerting people to, or notifying them of, a concern. Alert is one of the rare words that can be used in the same form as a noun, verb, and adjective. In all parts of speech, alert implies preparedness.

6. www.thefreedictionary.com › alertAlert - definition of alert by The Free Dictionary

   www.thefreedictionary.com › alert

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   1. A signal that warns of attack or danger: Sirens sounded the alert for an air raid. 2. A condition or period of heightened watchfulness or preparation for action: Nuclear-armed bombers were put on alert during the crisis. tr.v. a·lert·ed, a·lert·ing, a·lerts.

7. www.dictionary.com › browse › alertALERT Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › alert

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   An alert is a warning or alarm, especially an alarm about dangerous weather or a military attack, as in The National Weather Service has alerts for tornadoes, hurricanes, Nor’easters, and other severe weather occurrences.

8. www.yourdictionary.com › alertAlert Definition & Meaning - YourDictionary

   www.yourdictionary.com › alert

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   Alert Definition. ə-lûrt. alerted, alerting, alerts. Meanings. Synonyms. Sentences. Definition Source. Word Forms. Origin. Adjective. Noun. Verb. Idiom. Filter. adjective. Vigilantly attentive; watchful. Alert to danger; an alert bank guard. American Heritage. Watchful and ready, as in facing danger. Webster's New World.

9. www.ldoceonline.com › dictionary › alertalert | meaning of alert in Longman Dictionary of Contemporary...

   www.ldoceonline.com › dictionary › alert

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   alert. From Longman Dictionary of Contemporary English a‧lert1 /əˈlɜːt $ -ɜːrt/ adjective 1 giving all your attention to what is happening, being said etc The animal raised its head, suddenly alert.

10. www.britannica.com › dictionary › alertAlert Definition & Meaning | Britannica Dictionary

    www.britannica.com › dictionary › alert

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    [count] : something (such as a message or loud sound) that tells people there is some danger or problem : an alarm or signal of danger. They sounded an alert when enemy planes were approaching the city. Medical officials have put out an alert to hospitals to look out for the virus. The government has issued a terrorism/security alert. 2.

11. dictionary.cambridge.org › dictionary › learner-englishMeaning of alert – Learner’s Dictionary - Cambridge Dictionary

    dictionary.cambridge.org › dictionary › learner-english

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    ALERT definition: 1. quick to notice and react to things around you: 2. to warn someone of a possibly dangerous…. Learn more.